Processed wastewater sludge for improvement of mechanical properties of concretes

Dı́az, Carlos; Martínez-Barrera, Gonzalo; Gençel, Osman; Bernal-Martínez, Lina A.; Brostow, Witold

doi:10.1016/j.jhazmat.2011.04.103

Cited by 14 publications

(14 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To meet these requirements, research on reuse and recycling have been developed, which involves the use of ceramic waste in the manufacture of other ceramic materials or in the manufacture of concrete products. In both cases, the goal is to reduce waste disposal at landfills, reduce consumption of natural resources and reduce environmental impacts throughout the construction production chain, in addition to global cost reduction (Barrera-Díaz et al, 2011;Gencel et al, 2011Gencel et al, , 2012Gencel et al, , 2013Uygunoglu et al, 2012;Martínez-Barrera et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Reusing ceramic tile polishing waste in paving block manufacturing

Penteado

Carvalho

Lintz

2016

Journal of Cleaner Production

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Reusing ceramic tile polishing waste in paving block manufacturing

Penteado

Carvalho

Lintz

2016

Journal of Cleaner Production

View full text Add to dashboard Cite

“…Population growth, urbanization, improvement of living conditions, and the increment of the number of inhabitants connected to WWTPs are responsible for the increase of the amount of sewage sludge produced daily (70-90 g of dry sludge/inhabitant equivalent) [10][11][12][13] and the proper disposal of sludge is a serious environmental issue worldwide [3,14]. Generally, the selection of the best disposal route for the sludge from a particular treatment plant requires the identification of the most secure and environmentally acceptable final destination taking into account the local, regional and/or national conditions (technical, economical, political, geographical) [11,15,16].…”

Section: Introductionmentioning

confidence: 99%

“…Generally, the selection of the best disposal route for the sludge from a particular treatment plant requires the identification of the most secure and environmentally acceptable final destination taking into account the local, regional and/or national conditions (technical, economical, political, geographical) [11,15,16]. Traditional disposal alternatives which have been widely tried include landfilling, soil application, incineration and sea dumping [10][11][12][13][14][17][18][19][20] and currently in Europe the most desirable use of treated sludge is in agriculture as a soil fertilizer [21]. Contrary to the European trends, in Greece sludge utilization in agriculture is very limited [3], the vast majority (> 90%) being landfilled, while the respective mean value in EU countries is only 27% [15,[21][22][23].…”

Section: Introductionmentioning

confidence: 99%

“…Due to the heterogeneous nature of the sewage sludge produced at different municipal WWTPs and the annual/seasonal fluctuations in sludge chemical composition, an accurate knowledge of the heavy metal concentrations and their temporal variations is required when deciding on the suitability of application of sludge on agriculturally used soils [12,14]. In this regard, literature is very scarce for Greece in the last decade; heavy metal contents of municipal WWTP sludge were reported for 18 localities from all over the country [33], Thessaloniki [4], Kalamata [22], Komotini [23] and 4 localities in Crete Island [21].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Temporal variability of sewage sludge heavy metal content from Greek wastewater treatment plants

Spanos

Ene

Patronidou

et al. 2016

Ecological Chemistry and Engineering S

View full text Add to dashboard Cite

Abstract:The aim of this study was to evaluate the temporal variations of selected heavy metals level in anaerobic fermented and dewatered sewage sludge. Sewage sludge samples were collected in different seasons and years from three municipal wastewater treatment plants (WWTPs) located in Northern Greece, in Kavala (Kavala and Palio localities) and Drama (Drama locality) Prefectures. An investigation of the potential of sludge utilization in agriculture was performed, based on the comparison of average total heavy metal concentrations and of chromium species (hexavalent, trivalent) concentrations with the allowed values according to the Council Directive 86/278/EEC and Greek national legislation (Joint Cabinet Decision 80568/4225/91) guidelines. In this regard, all the investigated heavy metals (Cd, Cr, Cu, Ni, Pb, Zn, Hg) and chromium species Cr(VI) and Cr(III) have average concentrations (dry matter weight) well below the legislated thresholds for soil application, as following: 2.12 mg kg -1 Cd; 103.7 mg kg -1 Cr; 136.4 mg kg -1 Cu; < 0.2 mg kg -1 Hg; 29.1 mg kg -1 Ni; 62.0 mg kg -1 Pb; 1253.2 mg kg -1 Zn; 1.56 mg kg -1 Cr(VI) and 115.7 mg kg -1 Cr(III). Values of relative standard deviation (RSD) indicate a low or moderate temporal variability for domestic-related metals Zn (10.3-14.7%), Pb (27.9-44.5%) and Cu (33.5-34.2%), and high variability for the metals of mixed origin or predominantly resulted from commercial activities, such as Ni (42.4-50.7%), Cd (44.3-85.5%) and Cr (58.2-102.0%). For some elements the seasonal occurrence pattern is the same for Kavala and Palio sludge, as following: a) Cd and Cr: spring>summer>winter; b) Cu, Ni and Pb: winter>spring>summer. On average, in summer months (dry season) metal concentrations are lower than in spring and winter (wet seasons), with the exception of Zn. For Kavala and Palio the results demonstrate that the increased number of inhabitants (almost doubled) in summer time due to tourism does not influence the metal levels in sludge. Comparing the results obtained for similar spring-summerwinter sequences in 2007 and 2010/11 and for the spring season in 2007, 2008 and 2010, it can be noticed that, in general, the average heavy metal contents show an increasing tendency towards the last year. In all the measurement periods, the Palio sludge had the highest metal contents and Kavala sludge the lowest, leading to the conclusion that the WWTP operating process rather than population has a significant effect upon the heavy metal content of sludge. Cr(VI)/Cr(total) concentration ratios are higher for Kavala sludge in the majority of sampling campaigns, followed by Drama and Palio sludge. The metals which present moderate to strong positive correlation have common origin, which could be a domestic-commercial mixed source.

show abstract

“…Further, the EC technique does not require chemicals injections to elevate the treatment performance (except for the case where the ionic strength is weak so supporting electrolyte should be added to increase the solution electric conductivity [45]), and it may be with ease automated and combined with additional treatment setups [46] [47] [48]. In addition, EC technology hugely decreases the volume of the formed solid waste (sludge) that needs elevated treatment cost [49] [50]; which successively greatly reduces the working price of the EC technique [51] [52]. These merits of the EC process place it extremely encouraging choice to the classical treatment techniques [53] [54] [55].…”

mentioning

confidence: 99%

Electrocoagulation Process in the Context of Disinfection Mechanism

Ghernaout¹,

Elboughdiri²

2020

OALib

View full text Add to dashboard Cite

During the last three decades, the electrocoagulation (EC) process has known an exemplary renaissance in the field of water and wastewater treatment. Several researchers focused on applying this electrochemical technology in removing diverse pollutants such as pathogens. During EC method, the coagulant is furnished via solubilizing sacrificial electrodes upon an applied electric field. The easiness of the technology and the side phenomena involving the generation of gas bubbles are the major advantages. This work discusses briefly the main achievements and mechanisms in employing EC in disinfecting water. In the EC process, the microbes may be demobilized thanks to the direct adsorption on the surface of the anode pursued by electron transfer, and physical elimination through floating pathogens with formed hydrogen gas and/or precipitating with the produced flocs. Integrating EC with free radical assisted processes (e.g., electrooxidation), magnetic field and/or ultrasonic field remains an encouraging method to promote its implantation at full scale. Membrane processes should be considered as safe barriers towards disinfection by-products and hydroxyl radicals.

show abstract

Processed wastewater sludge for improvement of mechanical properties of concretes

Cited by 14 publications

References 49 publications

Reusing ceramic tile polishing waste in paving block manufacturing

Reusing ceramic tile polishing waste in paving block manufacturing

Temporal variability of sewage sludge heavy metal content from Greek wastewater treatment plants

Electrocoagulation Process in the Context of Disinfection Mechanism

Contact Info

Product

Resources

About